PlzNavigate: properly execute BeforeUnload on renderer initiated navigations

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 6dbdbb107ceadf21126e1f73a0104621d9a4861a..7c34892a8640d6bb6be199b4a521cb2f0c959d57 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -721,7 +721,7 @@ class CONTENT_EXPORT RenderFrameImpl
   void OnNavigate(const CommonNavigationParams& common_params,
                   const StartNavigationParams& start_params,
                   const RequestNavigationParams& request_params);
-  void OnBeforeUnload();
+  void OnBeforeUnload(bool is_reload);
   void OnSwapOut(int proxy_routing_id,
                  bool is_loading,
                  const FrameReplicationState& replicated_frame_state);